Is amoxicillin for dogs same as humans?

Dogs, like humans, are prone to bacterial infections, and amoxicillin is one of the most commonly prescribed antibiotics for both species. As a dog owner, it is essential to understand whether the amoxicillin meant for humans can be safely used in dogs, or if there are any differences between the two. This article will explore the similarities and differences between amoxicillin for dogs and humans.

What is Amoxicillin?

Amoxicillin is a type of antibiotic commonly used to treat bacterial infections in humans and animals. It is a popular choice among veterinarians due to its effectiveness and safety profile. Amoxicillin is part of the penicillin group of antibiotics and works by preventing bacteria from forming cell walls, eventually leading to their death.

Is Amoxicillin for Dogs the Same as Humans?

Yes, amoxicillin for dogs is the same drug that is used in humans. This makes sense because the bacterial infections that affect humans and dogs are often similar in nature, so the same antibiotics can be used to treat them. However, the dosage for dogs may differ from humans, and veterinarians should be consulted before administering any medication.

Dosage Differences

Although amoxicillin for dogs and humans is the same drug, the dosage can vary significantly. Dogs require a different dose than humans because of their size and the severity of their infection. In general, the dosage for dogs is determined by their weight, and the medication may be given more frequently than in human medicine. Additionally, the duration of the medication may be longer in dogs since bacterial infections can take more time to clear up completely.

Uses of Amoxicillin in Dogs

Like humans, dogs can suffer from a variety of bacterial infections. Some of the most common infections treated with amoxicillin in dogs include:

  • Skin infections
  • Respiratory infections
  • Urinary tract infections
  • Ear infections
  • Gastrointestinal infections

Skin Infections

Amoxicillin is commonly prescribed for skin infections, which can range from mild to severe. Some of the most common types of skin infections in dogs include hot spots, pyoderma, and cellulitis. If left untreated, skin infections can worsen, leading to more severe complications. Amoxicillin is an effective treatment that targets the bacteria causing the infection, promoting healing.

Respiratory Infections

Respiratory infections in dogs are often caused by bacteria such as Bordetella and Streptococcus. Some of the symptoms of respiratory infections in dogs include coughing, sneezing, and nasal discharge. Amoxicillin can help to clear up the infection, reduce inflammation, and ease the symptoms associated with respiratory infections.

Urinary Tract Infections

Urinary tract infections (UTIs) are common in dogs, particularly in females. Symptoms of a UTI in a dog may include frequent urination, straining to urinate, blood in the urine, and a strong-smelling urine. Amoxicillin can be prescribed to treat a UTI and alleviate the associated symptoms.

Side Effects of Amoxicillin in Dogs

While amoxicillin is a safe and effective medication for dogs, some side effects can occur. These side effects are usually mild and go away on their own. However, some dogs may be allergic to amoxicillin, in which case they may develop more severe symptoms that require immediate veterinary attention. Some of the potential side effects of amoxicillin in dogs may include:

  • Vomiting
  • Diarrhea
  • Loss of appetite
  • Dehydration
  • Allergic reactions, such as difficulty breathing, hives, or swelling

Potential Interactions

Amoxicillin can interact with other medications, so it is essential to let the veterinarian know about any other medications or supplements the dog is taking. In some cases, amoxicillin may reduce the effectiveness of other drugs or lead to adverse effects.


Amoxicillin is an effective medication that can be used to treat bacterial infections in both dogs and humans. While the drug is the same, the dosage and duration of treatment may differ between the two species. If you suspect that your dog has a bacterial infection, always consult with a veterinarian to determine the appropriate treatment.


  • Can amoxicillin be used to treat kennel cough in dogs?
  • Yes, amoxicillin can be used to treat kennel cough in dogs. However, it is important to note that kennel cough is often caused by a virus, so antibiotics may not be effective at treating the condition unless there is a secondary bacterial infection present.

  • How long does it take for amoxicillin to work in dogs?
  • The length of time it takes for amoxicillin to work in dogs can vary depending on the severity of the infection. Typically, dogs will start to show improvement within a few days of starting the medication, but it is important to complete the full course of treatment to ensure that the infection is completely cleared up.

  • Can I give my dog human amoxicillin?
  • No, it is not recommended to give human amoxicillin to dogs without consulting a veterinarian first. While the drug may be the same, the dosage and duration of treatment may differ, and there may be some differences in the formulation of the medication that could be harmful to your dog.

  • Can amoxicillin cause diarrhea in dogs?
  • Yes, one of the potential side effects of amoxicillin in dogs is diarrhea. This is usually a mild side effect, and most dogs will recover within a few days. If the diarrhea persists or is severe, it is important to contact the veterinarian to determine if any further treatment is necessary.


  • AAHA: “What Is Amoxicillin?”
  • Merck Veterinary Manual: “Amoxicillin.”
  • Anthony P. Carr, BVMS, MVM, PhD, DECVP, DACVP, FRCPath: “Amoxicillin.”